OCG has an extensive range of equipment for ventilation quantity and pressure surveys. This includes:
- Paroscientific 760 Digiquartz Pressure Standard Digital Barometers
- Druck DPI 705 IS Digital Manometer
- Comark C9501IS Digital Manometer
- Lambrecht 761 Psychrometer
- Lambrecht 1405 Vane Anemometers
- Pitot Tubes